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Method for preparing metal ion adsorbent

A metal ion and adsorbent technology, which is applied in the field of metal ion adsorbent preparation, can solve the problems of less repeated use, narrow application range, poor processing capacity, etc. Effect

Inactive Publication Date: 2010-09-01
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a preparation method of metal ion adsorption resin to solve the problems of narrow environmental application range, poor processing capacity, poor salt tolerance, less repeated use times, and difficult desorption of resins currently used in the treatment of metal ions in wastewater in China.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The preparation method of the superabsorbent resin for agriculture and forestry in this example adopts the inverse suspension emulsion polymerization method, which is specifically carried out according to the following steps: 1. Dissolving β-cyclodextrin in a certain amount of hydrogen In the sodium oxide solution, the alkali solution of β-cyclodextrin is obtained, and the amount of alkali is controlled so that the neutralization degree is 60% to 85%; 2. The alkali solution of β-cyclodextrin is placed in the reactor, and cyclohexane alkane, heated in a water bath at a certain temperature, stirred and passed into nitrogen; 3. Dissolve acrylic acid, acrylamide, initiator and crosslinking agent in deionized water respectively and pour them into two constant pressure dropping funnels to obtain monomer and Initiator solution system; 4. Raise the temperature of the reactor to 45 ℃ ~ 70 ℃, under the protection of nitrogen, slowly add the monomer and the initiation crosslinking ...

Embodiment 2

[0016] Dissolve 2g of β-cyclodextrin in 2.19g of sodium hydroxide solution to obtain an alkali solution of β-cyclodextrin, control the amount of alkali so that the degree of neutralization of acrylic acid is 85%; the alkali of β-cyclodextrin The solution was placed in a reactor, 50 mL of cyclohexane was added, heated in a water bath at a certain temperature, stirred and fed with nitrogen; 0.75 g of acrylic acid and 5.25 g of acrylamide were dissolved in deionized water and poured into a constant pressure dropping funnel to obtain a single Body system solution; Weigh 0.3% potassium persulfate and 0.05% N, N-methylenebisacrylamide, which account for the total mass percentage of the monomers, dissolve them with deionized water and stir evenly, then pour into The initiator solution system was obtained in the dropping funnel; the reactor was heated to 65°C, and under the protection of nitrogen, the monomer and the initiator solution system were slowly added dropwise to the reactor f...

Embodiment 3

[0018]Dissolve 2g of β-cyclodextrin in 2.47g of sodium hydroxide solution to obtain an alkaline solution of β-cyclodextrin, control the amount of alkali so that the neutralization degree is 80%; place the alkaline solution of β-cyclodextrin in Add 50mL cyclohexane to the reactor, heat and stir in a water bath at a certain temperature, and pass in nitrogen gas; dissolve 0.75g of acrylic acid and 5.25g of acrylamide in deionized water and pour them into a constant pressure dropping funnel to obtain a monomer system solution ; Weigh 0.4% potassium persulfate and 0.04% N,N-methylenebisacrylamide, which are 0.4% of the total mass percentage of the monomer, dissolve and stir evenly with deionized water and pour into the dropping funnel Initiator solution system was obtained in ; the temperature of the reactor was raised to 60°C, and under the protection of nitrogen, the monomer and initiator solution system were slowly added dropwise into the reactor for 1.5h of polymerization reacti...

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Abstract

The invention discloses a method for preparing a metal ion adsorbent, and relates to a method for preparing resin with adsorption function on metal ions. The method uses beta-cyclodextrine as a raw material, and uses acrylic acid and acrylamide as copolymerization reactants. The method comprises the following steps of: adding alkali solution of the beta-cyclodextrine and cyclohexane into a reactor, heating the reactor in a water bath and introducing nitrogen into the reactor, and stirring the mixture; and then dropwise adding uniformly stirred solution of initiator, cross linker, acrylic acid and acrylamide into the reactor to perform polymerization reaction, and obtaining the resin with performance of adsorbing the metal ions by heat preservation, cooling, filtering and vacuum drying. The resin prepared by the method has good adsorption effect on heavy metal ions such as copper ions, lead ions, cadmium ions and the like, the metal ion adsorbing capacity of 80 mg / L Cu2+ solution is 107.37 mg / g, the metal ion adsorbing capacity of 80 mg / L Pb2+ solution is 80.04 mg / g, the metal ion adsorbing capacity of 80 mg / L Cd2+ solution is 78,94 mg / g, and the resin can be made into a heavy metal ion wastewater treating agent and has good application prospect in the aspects of removing and reclaiming heavy metal ions.

Description

technical field [0001] The invention relates to a preparation method of a metal ion adsorbent. Background technique [0002] my country's water resources are seriously polluted and water resources are seriously lacking. Most of the 17,000 cities and towns in the country have no drainage and treatment facilities. Due to the low treatment and recycling rate of waste water, coupled with the double increase in industrial water use, the double increase in the level of urbanization, and the accelerated development of small towns, the discharge of waste water will increase several times or even ten times, which will be even more serious. Deterioration of the water environment. Industrial and agricultural wastewater, urban domestic sewage and various mining wastewater all contain a large amount of heavy metals, which are bioaccumulated through the food chain and constitute a serious threat to organisms and human health. In order to avoid the serious impact of heavy metal pollution...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/62
Inventor 黄占华徐莉莉张斌于淑娜蒲伟刘乃琪
Owner NORTHEAST FORESTRY UNIVERSITY
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